Index Catalog // ScholarsArchive@OSU

Top-down Influences of bald eagles on common murre populations in Oregon

Creator:: Horton, Cheryl A.
Abstract:: Populations of organisms are influenced by both top-down (predator driven) and bottom-up (environment or resource driven) effects. Seabird research has largely focused on bottom-up factors influencing reproduction, with little emphasis on top-down. Our goal was to better understand top-down impacts on colonial nesting seabirds over a range of spatio-temporal scales....
Resource Type:: Masters Thesis
Full Text:: in Oregon AN ABSTRACT OF THE THESIS OF Cheryl A. Horton for the degree of Master

The effect of broadcast burning on the quality of winter forage for elk, westen Oregon

Creator:: Friesen, Cheryl Ann
Abstract:: The Roosevelt elk (Cervus elephus roosevelti) is a National Forest management indicator species on the westside of the Cascade mountains, Western Oregon. A Habitat Effectiveness model is used by State and Federal agencies to evaluate elk habitat in the region. Concerns about the model's lack of differentiation between winter and...
Resource Type:: Masters Thesis
Full Text:: forage for elk, westen Oregon AN ABSTRACT OF THE THESIS OF Cheryl Ann Friesen for the degree of Master

Predicting the distribution of the fisher (Martes pennanti) in northwestern California, U.S.A. : using survey data and GIS modeling

Creator:: Carroll, Carlos
Abstract:: Forest carnivores such as the fisher have frequently been the target of conservation concern due to their association with older forests and assumed sensitivity to landscape-level habitat alteration. Although the fisher has been extirpated from most of its former range in the western U.S., it is still found throughout much...
Resource Type:: Masters Thesis
Full Text:: GIS Modeling Abstract approved: Reed F. Noss Forest carnivores such as the fisher have frequently

Delineating pattern and process in tropical lowland : mealy parrot migration dynamics as a guide for regional conservation planning

Creator:: Bjork, Robin D.
Abstract:: Most reserves fail to capture the habitat heterogeneity necessary to maintain viable populations of wide-ranging species. Methods to determine defensible dimensions of reserves and reserve networks are needed. The primary goal of this study was to develop such methods for lowland tropical forests by examining habitat- and spatial-use patterns of...
Resource Type:: Dissertation
Full Text:: Conservation Planning. / Abstract approved: ..,,. Signature redacted for privacy. Reed F. Noss Most

Multiscale relationships of wintering birds with riparian and wetland habitat in the Willamette Valley, Oregon

Creator:: Adamus, Paul R.
Abstract:: Relatively little is known about wintering bird communities in lowlands of the Pacific Northwest, yet, the condition of winter habitats potentially can pose a major constraint on bird populations. I initiated a study to determine: (1) Which avian species use lowland riparian and wetland habitats in the Willamette Valley during...
Resource Type:: Dissertation
Full Text:: McComb, Raymond O'Connor, Dave Wallin, and members of my committee. Reed Noss, as the committee Chair

The Influence of Alternate Life History Strategies and Natal Conditions on the Reproductive Performance of Adélie Penguins Breeding on Ross Island, Antarctica

Creator:: Kappes, Peter J.
Abstract:: A fundamental objective of ecology and population biology is to identify factors that drive population dynamics and determine the population-level consequences of their interaction with the environment. Studies of reproductive performance can illuminate population dynamic processes, including the links between organismal biology, the environment, and life history theory. A central...
Resource Type:: Dissertation
Full Text:: Engelman, Digger Anthony, Anna Mangan, Leila Duchac, Cheryl Horton, Lee Foster, Chad Marks-Fife, Kevin

The reproductive biology of the mountain cottontail rabbit in Oregon

Creator:: Powers, Roger Alan
Abstract:: The reproductive characteristics of the mountain cottontail rabbit, Sylvilagus nuttalli (Bachman), were investigated from 269 specimens collected in central Oregon between 28 May 1968 and 28 August 1969. Male rabbits were in breeding condition between mid-February and 3 July 1969. Nearly 77% of the females bore four litters between 7...
Resource Type:: Masters Thesis
Full Text:: COTTONTAIL RABBIT IN OREGON Redacted for privacy Abstract approved: B. J. Verts The reproductive

Floodplain vegetation following over 80 years of intensive land use and de-watering : Lower Owens River, California

Creator:: Risso, Derek A.
Abstract:: Riparian areas in the arid western United States are critical ecosystems that have been severely degraded by a variety of land and water uses over the last 100 years. In this study, the composition and structure of floodplain vegetation along the Lower Owens River in eastern California was quantitatively described...
Resource Type:: Masters Thesis
Full Text:: : _________________________________________________ J. Boone Kauffman Riparian areas in the arid western United States are critical ecosystems

Effect of livestock grazing on native bees in a Pacific Northwest bunchgrass prairie

Creator:: Kimoto, Chiho
Abstract:: Native bees play an important role as pollinators of natural vegetation and agricultural crops. Yet many pollinators, including some native bees, are declining in numbers. Some of the potential causes of these declines are habitat destruction and degradation by various human land uses, including urban development and sprawl, construction of...
Resource Type:: Masters Thesis
Full Text:: Bunchgrass Prairie. Abstract approved: Sandra J. DeBano Native bees play an important role

Interactive influences of wildfire and nonnative species on plant community succession in Hawaii Volcanoes National Park

Creator:: Ainsworth, Alison
Abstract:: The role of fire as a natural disturbance, its interactions with nonnative species and effects of repeated fires in the Hawaiian Islands have received little investigation. We are unsure of the role fire played in shaping forest structure and composition as well as affecting evolutionary processes of the native biota....
Resource Type:: Masters Thesis
Full Text:: Hawaiian Tropical Dry Forest. Conservation Biology 14:439-453. Cain, M. D., T. B. Wigley, and D. J. Reed

ScholarsArchive@OSU

Top-down Influences of bald eagles on common murre populations in Oregon

The effect of broadcast burning on the quality of winter forage for elk, westen Oregon

Predicting the distribution of the fisher (Martes pennanti) in northwestern California, U.S.A. : using survey data and GIS modeling

Delineating pattern and process in tropical lowland : mealy parrot migration dynamics as a guide for regional conservation planning

Multiscale relationships of wintering birds with riparian and wetland habitat in the Willamette Valley, Oregon

The Influence of Alternate Life History Strategies and Natal Conditions on the Reproductive Performance of Adélie Penguins Breeding on Ross Island, Antarctica

The reproductive biology of the mountain cottontail rabbit in Oregon

Floodplain vegetation following over 80 years of intensive land use and de-watering : Lower Owens River, California

Effect of livestock grazing on native bees in a Pacific Northwest bunchgrass prairie

Interactive influences of wildfire and nonnative species on plant community succession in Hawaii Volcanoes National Park

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